88209813 has 16 divisors (see below), whose sum is σ = 123607616. Its totient is φ = 55883520.

The previous prime is 88209811. The next prime is 88209833. The reversal of 88209813 is 31890288.

It is not a de Polignac number, because 88209813 - 2¹ = 88209811 is a prime.

It is a super-2 number, since 2×88209813² = 15561942218989938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88209811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4468 + ... + 14013.

It is an arithmetic number, because the mean of its divisors is an integer number (7725476).

Almost surely, 2^88209813 is an apocalyptic number.

It is an amenable number.

88209813 is a deficient number, since it is larger than the sum of its proper divisors (35397803).

88209813 is a wasteful number, since it uses less digits than its factorization.

88209813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18564.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 88209813 is about 9392.0079322794. The cubic root of 88209813 is about 445.1492374932.

The spelling of 88209813 in words is "eighty-eight million, two hundred nine thousand, eight hundred thirteen".